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<a name="gst-plugins-bad-plugins-mplex"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-mplex.top_of_page"></a>mplex</span></h2>
<p>mplex</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--bufsize" title="The “bufsize” property">bufsize</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">GstMplexFormat</span></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--format" title="The “format” property">format</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--mux-bitrate" title="The “mux-bitrate” property">mux-bitrate</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--packets-per-pack" title="The “packets-per-pack” property">packets-per-pack</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--sector-size" title="The “sector-size” property">sector-size</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--system-headers" title="The “system-headers” property">system-headers</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--vbr" title="The “vbr” property">vbr</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<a name="GstMplex"></a><div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex-struct" title="GstMplex">GstMplex</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GObject-struct">GObject</a>
    <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
        <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstObject.html#GstObject-struct">GstObject</a>
            <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstElement.html#GstElement-struct">GstElement</a>
                <span class="lineart">╰──</span> GstMplex
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.description"></a><h2>Description</h2>
<p>This element is an audio/video multiplexer for MPEG-1/2 video streams
and (un)compressed audio streams such as AC3, MPEG layer I/II/III.
It is based on the <a class="ulink" href="http://mjpeg.sourceforge.net/" target="_top">mjpegtools</a> library.
Documentation on creating MPEG videos in general can be found in the</p>
<a class="ulink" href="https://sourceforge.net/docman/display_doc.php?docid=3456&amp;group_id=5776" target="_top">MJPEG Howto</a><p>and the man-page of the mplex tool documents the properties of this element,
which are shared with the mplex tool.</p>
<div class="refsect2">
<a name="id-1.2.99.7.5"></a><h3>Example pipeline</h3>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v videotestsrc num<span class="gtkdoc opt">-</span>buffers<span class="gtkdoc opt">=</span><span class="number">1000</span> <span class="gtkdoc opt">!</span> mpeg2enc <span class="gtkdoc opt">!</span> mplex <span class="gtkdoc opt">!</span> filesink location<span class="gtkdoc opt">=</span>videotestsrc<span class="gtkdoc opt">.</span>mpg</pre></td>
      </tr>
    </tbody>
  </table>
</div>
 This example pipeline will encode a test video source to an
MPEG1 elementary stream and multiplexes this to an MPEG system stream.
<p>
If several streams are being multiplexed, there should (as usual) be
a queue in each stream, and due to mplex' buffering the capacities of these
may have to be set to a few times the default settings to prevent the
pipeline stalling.
</p>
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.99.7.6.1"></a><h3>Element Information</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">plugin</span></p></td>
<td>
            <a class="link" href="gst-plugins-bad-plugins-plugin-mplex.html#plugin-mplex">mplex</a>
          </td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Andrew Stevens &lt;andrew.stevens@nexgo.de&gt;
Ronald Bultje &lt;rbultje@ronald.bitfreak.net&gt;
Mark Nauwelaerts &lt;mnauw@users.sourceforge.net&gt;</td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Codec/Muxer</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.99.7.6.2"></a><h3>Element Pads</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>audio_%u</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>sink</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>request</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>audio/mpeg, mpegversion=(int)1, layer=(int)[ 1, 3 ], channels=(int)[ 1, 8 ], rate=(int)[ 8000, 96000 ]</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-ac3, channels=(int)[ 1, 8 ], rate=(int)[ 8000, 96000 ]</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-dts</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw, format=(string){ S16BE, S20BE, S24BE }, rate=(int){ 48000, 96000 }, channels=(int)[ 1, 6 ]</td>
</tr>
</tbody>
</table></div>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>video_%u</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>sink</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>request</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>video/mpeg, mpegversion=(int){ 1, 2 }, systemstream=(boolean)false, width=(int)[ 16, 4096 ], height=(int)[ 16, 4096 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td>
</tr>
</tbody>
</table></div>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>src</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>source</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>always</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>video/mpeg, systemstream=(boolean)true</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.functions_details"></a><h2>Functions</h2>
<p></p>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstMplex-struct"></a><h3>GstMplex</h3>
<pre class="programlisting">typedef struct _GstMplex GstMplex;</pre>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstMplex--bufsize"></a><h3>The <code class="literal">“bufsize”</code> property</h3>
<pre class="programlisting">  “bufsize”                  <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></pre>
<p>Target decoders video buffer size (kB) [default determined by format if not explicitly set].</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [20,4000]</p>
<p>Default value: 46</p>
</div>
<hr>
<div class="refsect2">
<a name="GstMplex--format"></a><h3>The <code class="literal">“format”</code> property</h3>
<pre class="programlisting">  “format”                   <span class="type">GstMplexFormat</span></pre>
<p>Encoding profile format.</p>
<p>Flags: Read / Write</p>
<p>Default value: DVD MPEG-2</p>
</div>
<hr>
<div class="refsect2">
<a name="GstMplex--mux-bitrate"></a><h3>The <code class="literal">“mux-bitrate”</code> property</h3>
<pre class="programlisting">  “mux-bitrate”              <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></pre>
<p>Bitrate of output stream in kbps (0 = autodetect).</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [0,15360]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstMplex--packets-per-pack"></a><h3>The <code class="literal">“packets-per-pack”</code> property</h3>
<pre class="programlisting">  “packets-per-pack”         <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></pre>
<p>Number of packets per pack for generic formats.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [1,100]</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="GstMplex--sector-size"></a><h3>The <code class="literal">“sector-size”</code> property</h3>
<pre class="programlisting">  “sector-size”              <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a></pre>
<p>Specify sector size in bytes for generic formats.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [256,16384]</p>
<p>Default value: 2048</p>
</div>
<hr>
<div class="refsect2">
<a name="GstMplex--system-headers"></a><h3>The <code class="literal">“system-headers”</code> property</h3>
<pre class="programlisting">  “system-headers”           <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre>
<p>Create system header in every pack for generic formats.</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GstMplex--vbr"></a><h3>The <code class="literal">“vbr”</code> property</h3>
<pre class="programlisting">  “vbr”                      <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre>
<p>Whether the input video stream is variable bitrate.</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-mplex.see-also"></a><h2>See Also</h2>
<p>mpeg2enc</p>
</div>
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